EP2107261A2 - Hydrodynamische Kegelrollenlager und Gasturbinenmotorsysteme mit derartigen Lagern - Google Patents

Hydrodynamische Kegelrollenlager und Gasturbinenmotorsysteme mit derartigen Lagern Download PDF

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Publication number
EP2107261A2
EP2107261A2 EP09250501A EP09250501A EP2107261A2 EP 2107261 A2 EP2107261 A2 EP 2107261A2 EP 09250501 A EP09250501 A EP 09250501A EP 09250501 A EP09250501 A EP 09250501A EP 2107261 A2 EP2107261 A2 EP 2107261A2
Authority
EP
European Patent Office
Prior art keywords
bearing
inner race
cage
rim
outer cage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP09250501A
Other languages
English (en)
French (fr)
Other versions
EP2107261A3 (de
EP2107261B1 (de
Inventor
Loc Duong
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RTX Corp
Original Assignee
United Technologies Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by United Technologies Corp filed Critical United Technologies Corp
Publication of EP2107261A2 publication Critical patent/EP2107261A2/de
Publication of EP2107261A3 publication Critical patent/EP2107261A3/de
Application granted granted Critical
Publication of EP2107261B1 publication Critical patent/EP2107261B1/de
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • F16C33/4605—Details of interaction of cage and race, e.g. retention or centring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/16—Arrangement of bearings; Supporting or mounting bearings in casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/225—Details of the ribs supporting the end of the rollers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
    • F16C19/36—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers
    • F16C19/364—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • F16C33/467—Details of individual pockets, e.g. shape or roller retaining means
    • F16C33/4682—Details of individual pockets, e.g. shape or roller retaining means of the end walls, e.g. interaction with the end faces of the rollers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/583—Details of specific parts of races
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • F16C33/6659—Details of supply of the liquid to the bearing, e.g. passages or nozzles
    • F16C33/6677—Details of supply of the liquid to the bearing, e.g. passages or nozzles from radial inside, e.g. via a passage through the shaft and/or inner ring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/50—Bearings
    • F05D2240/53—Hydrodynamic or hydrostatic bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2360/00—Engines or pumps
    • F16C2360/23—Gas turbine engines

Definitions

  • the invention generally relates to bearings.
  • roller bearings are utilized in a gas turbine engine to support a turbine shaft.
  • an exemplary embodiment of a bearing cage for a tapered roller bearing having rollers comprises: an outer cage rim and an inner cage rim; the outer cage rim having a rounded edge at a location of contact between the outer cage rim and a roller.
  • An exemplary embodiment of a bearing assembly comprises: a plurality of rollers, each of the rollers having an end; and a bearing cage operative to contain the plurality of rollers, the bearing cage having an outer cage rim, the outer cage rim having a rounded edge at a location of contact between the outer cage rim and first end of a first of the rollers.
  • An exemplary embodiment of a gas turbine engine comprises a compressor; a shaft interconnected with the compressor; a turbine operative to drive the shaft; and a bearing assembly operative to support to the shaft, the bearing assembly having a plurality of rollers, a race and a bearing cage operative to contain the plurality of rollers, the bearing cage having a cage rim, the cage rim of the bearing cage being operative to direct load imparted via the rollers to the race.
  • FIG. 1 is a schematic diagram depicting an exemplary embodiment of a gas turbine engine.
  • FIG. 2 is a schematic diagram depicting an exemplary embodiment of a hydrodynamic tapered bearing assembly.
  • FIG. 3 is a perspective diagram depicting a portion of the hydrodynamic tapered bearing assembly of FIG. 2 .
  • FIG. 4 is a perspective diagram depicting another portion of the hydrodynamic tapered bearing assembly of FIG. 2 .
  • Tapered roller bearings and gas turbine engine systems involving such bearings are provided, several exemplary embodiments of which will be described in detail.
  • some embodiments involve the use of a bearing cage that limits contact of the cage to locations on the roller ends that exhibit reduced motion relative to the cage. As such, friction between the cage and the rollers can be reduced.
  • various applications of the bearings can involve gas turbine engine systems.
  • FIG. 1 depicts an exemplary embodiment of a gas turbine engine utilizing an embodiment of a hydrodynamic tapered roller bearing.
  • engine 100 is depicted as a turbofan gas turbine engine that incorporates a fan 102, a compressor section 104, a combustion section 106 and a turbine section 108.
  • turbofan gas turbine engine it should be understood that the concepts described herein are not limited to use with turbofans or other types of gas turbine engines as the teachings may be applied to other types of engines or other mechanical systems that incorporate tapered roller bearings.
  • tapered roller bearing 110 is utilized in gas turbine engine 100 to support turbine shaft 112.
  • tapered roller bearings such as bearing 110, can be utilized in gas turbine engine 100 to carry both radial and axial loads simultaneously.
  • FIG. 2 depicts an exemplary embodiment of a tapered roller bearing assembly 200.
  • Bearing assembly 200 incorporates multiple rollers (e.g., a roller 250) that are held by a bearing cage 238, which includes an outer cage rim 240 and an inner cage rim 242.
  • the rollers run about a longitudinal axis 202 between the outer raceway 212 of an outer race 220 and the inner raceway 222 of an inner race 220.
  • the inner race 220 also includes an inner race flange 230 that defines a radially disposed annular surface 231 and an axially disposed annular surface 233.
  • Bearing assembly 200 includes a bearing cage configured to reduce this wear and/or contact sliding by using outer cage rim 240 to transfer load from the vicinity of area 260 to the inner race flange 230. Additionally or alternatively, wear and/or sliding contact can be reduced by outer cage rim 240 contacting each roller at a location of reduced relative motion. That is, contact between the outer cage rim and the roller is provided at an outer axial end of the longitudinal axis of each roller (e.g., at location 255 of axis 252 of roller 250), the theoretical point of zero relative velocity between outer cage rim and roller.
  • the outer cage rim 240 incorporates a rounded edge 254 at a point of contact between the outer cage rim 240 and roller end 250 to reduce the degree of contact between the roller end 250 and the outer cage rim 240.
  • the outer cage rim 240 is shaped to direct the axial load path through the bearing cage rims 240, 242.
  • the outer cage rim 240 is generally L-shaped (in cross sectional view), incorporating a radially disposed annular surface 241 and an axially disposed annular surface 243.
  • Such a configuration provides alignment with inner race flange 230 along, for example, line 236 both axially and radially.
  • bearing assembly 200 is lubricated by oil.
  • inner race flange 230 includes a recess area 232 to provide lubrication oil to various surfaces of bearing assembly 200.
  • inner race flange 230 includes a plurality of channels 234 for distribution of oil sourced from the recess area 232.
  • the oil lubricates the point of contact 254 between the edge of outer cage rim 240 and roller 250. At point of contact 254, there exists a low resultant relative difference in contact speed between the outer cage rim 240 and the roller 250, creating a theoretical point of zero relative velocity. This tends to reduce friction and wear between the rollers and inner race flange 230 as compared with conventional configurations in which those surfaces are in direct contact with each other (location 260).
  • FIG. 3 depicts a portion of bearing assembly 200.
  • surface 231 of inner race flange 230 includes multiple lobes (e.g., lobe 306) to further enhance loading stability.
  • the multiple lobes are located, for example, in an equally spaced apart fashion along surface 231.
  • each of the lobes extends radially along surface 231 and is configured to interact with surface 241 of the outer cage rim 240.
  • three such lobes are used, with the lobes being separated from one another by an angle of approximately 120 degrees.
  • various other numbers and spacings of lobes can be used.
  • the number of lobes can be varied to affect loading stability, for example.
  • oil is circulated in bearing assembly 200 from recess area 232 through the inner race flange 230.
  • the oil flow routes through channels 234 to the top and inner side of the inner race flange 230 for contact with the outer cage rim 230 and the remainder of the bearing assembly 200.
  • Each lobe operates as a wedge that affects hydrodynamic loading capacity.
  • the number of channels 234 and the placement of the channels 234 in the inner race flange 230 can be varied to affect oil flow and loading stability, for example.
  • Lobes can be varied in size in radial, axial and/or circumferential directions to affect loading stability. Variation in size of the lobes affects oil flow and the volume of oil that can be delivered into each location of the bearing assembly 200, thus affecting loading stability of the bearing assembly 200.
  • FIG. 4 depicts multiple lobes located on surface 233 for increased hydrodynamic loading stability.
  • the lobes e.g., lobe 402
  • the lobes extend axially along surface 233 and are circumferentially separated from one another by an angle 406 of approximately 120 degrees.
  • the lobes 402 can vary in size in radial, axial and/or circumferential directions to affect loading stability.
  • the bearing axial load path is re-directed through the outer cage rim to the inner race flange (surface 231) that acts as a hydrodynamic thrust bearing.
  • the same concept could be applied to the roller end corresponding to the inner cage rim, resulting in a tapered roller bearing with double hydrodynamic thrust bearing faces.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)
EP09250501.5A 2008-02-25 2009-02-25 Rollenlager und Gasturbinenmotorsysteme mit derartigen Lagern Expired - Fee Related EP2107261B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12/036,581 US8235599B2 (en) 2008-02-25 2008-02-25 Hydrodynamic tapered roller bearings and gas turbine engine systems involving such bearings

Publications (3)

Publication Number Publication Date
EP2107261A2 true EP2107261A2 (de) 2009-10-07
EP2107261A3 EP2107261A3 (de) 2012-08-01
EP2107261B1 EP2107261B1 (de) 2018-09-05

Family

ID=40707884

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09250501.5A Expired - Fee Related EP2107261B1 (de) 2008-02-25 2009-02-25 Rollenlager und Gasturbinenmotorsysteme mit derartigen Lagern

Country Status (2)

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US (2) US8235599B2 (de)
EP (1) EP2107261B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019110299A1 (de) * 2019-04-18 2020-10-22 Schaeffler Technologies AG & Co. KG Kegelrollenlager

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8182156B2 (en) * 2008-07-31 2012-05-22 General Electric Company Nested bearing cages
US8727632B2 (en) 2011-11-01 2014-05-20 General Electric Company Bearing support apparatus for a gas turbine engine
US10001028B2 (en) 2012-04-23 2018-06-19 General Electric Company Dual spring bearing support housing
GB201314050D0 (en) 2013-08-06 2013-09-18 Rolls Royce Plc Tapered oil feed bearing cage
US10641332B2 (en) * 2016-12-06 2020-05-05 General Electric Company Roller element bearing with preloaded hydrodynamic cage guides

Citations (1)

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Publication number Priority date Publication date Assignee Title
US4714358A (en) 1985-02-07 1987-12-22 Fag Kugelfischer Georg Schafer (Kgaa) Cage for lipless roller bearings

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Publication number Priority date Publication date Assignee Title
US4714358A (en) 1985-02-07 1987-12-22 Fag Kugelfischer Georg Schafer (Kgaa) Cage for lipless roller bearings

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019110299A1 (de) * 2019-04-18 2020-10-22 Schaeffler Technologies AG & Co. KG Kegelrollenlager

Also Published As

Publication number Publication date
US8360657B2 (en) 2013-01-29
EP2107261A3 (de) 2012-08-01
EP2107261B1 (de) 2018-09-05
US20090214147A1 (en) 2009-08-27
US20120213463A1 (en) 2012-08-23
US8235599B2 (en) 2012-08-07

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